Joy Bidet C2-SC. Self-Cleaning. Fresh Water Spray. Non-Electric Mechanical Bidet Toilet Seat Attachment Cold Water Connection with Standard Metal Braided Hose Self-Cleaning Feature. Water Falls on the Nozzle to Clean It. 15 Month Warranty Attaches and Detaches Easily to Most 2-Piece Toilets and some 1-piece toilets. East Water Pressure Adjustment with the Pressure Control Knob